1135250021 has 16 divisors (see below), whose sum is σ = 1239804720. Its totient is φ = 1035141120.

The previous prime is 1135250003. The next prime is 1135250029. The reversal of 1135250021 is 1200525311.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 269419396 + 865830625 = 16414^2 + 29425^2 .

It is a cyclic number.

It is not a de Polignac number, because 1135250021 - 2²⁶ = 1068141157 is a prime.

It is a super-2 number, since 2×1135250021² = 2577585220361000882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1135249975 and 1135250002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1135250029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147845 + ... + 155333.

It is an arithmetic number, because the mean of its divisors is an integer number (77487795).

Almost surely, 2^1135250021 is an apocalyptic number.

It is an amenable number.

1135250021 is a deficient number, since it is larger than the sum of its proper divisors (104554699).

1135250021 is a wasteful number, since it uses less digits than its factorization.

1135250021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7784.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1135250021 is about 33693.4714892960. The cubic root of 1135250021 is about 1043.1910191032.

Adding to 1135250021 its reverse (1200525311), we get a palindrome (2335775332).

The spelling of 1135250021 in words is "one billion, one hundred thirty-five million, two hundred fifty thousand, twenty-one".